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The most common view of measurement uncertainty uses random variables as mathematical models for uncertain quantities and simple probability distributions as sufficient for representing measurement uncertainties.
The GUM defines measurement uncertainty as a "parameter, associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand''.
Uncertainty of measurement (UM, also referred to as measurement uncertainty, MU), traceability and numerical significance are inter-related concepts that affect both the format and the information conveyed by a quantitative result.
In the case where the reading uncertainty in a measurement is larger than the estimated standard deviation, the reading uncertainty is the uncertainty in each individual measurement. The reading uncertainty almost by definition has one and only one significant figure.
2.1 What is uncertainty of measurement? The uncertainty of a measurement tells us something about its quality. Uncertainty of measurement is the doubt that exists about the result of any measurement.
This is a brief summary of the method of evaluating and expressing uncertainty in measurement adopted widely by U.S. industry, companies in other countries, NIST, its sister national metrology institutes throughout the world, and many organizations worldwide.
This means its mass lies between 6.722 and 6.724 grams, an uncertainty of 0.001 gram. Every measurement has some uncertainty, which depends on the device used (and the user’s ability). All of the digits in a measurement, including the uncertain last digit, are called significant figures or significant digits. Note that zero may be a measured ...
The ‘Guide to the expression of uncertainty in measurement’ (GUM) establishes general rules for evaluating and expressing uncertainty in measurement from the shop floor to fundamental research.
A measurement means giving a number to the property. some experiments or tests are not measurements, e.g. counting, comparing two objects, etc. Uncertainty of measureement# it tells something about quality of measurement. Uncertainty of measurement is the doubt that exists about the result of any measurement
NIST Uncertainty Machine - An online calculator to perform uncertainty evaluations according to the Guide to the Expression of Uncertainty Measurement (GUM), the GUM Supplement 1, and the NIST Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results.